Spring WS Vulnerable: Wss4jSI Bypass WSS4J BSP (5.0.0-5.0.1,4.1.0-4.1.3)
CVE-2026-40994 Published on June 11, 2026
Wss4jSecurityInterceptor disables WS-I BSP validation by default
Wss4jSecurityInterceptor initialized its BSP (WS-I Basic Security Profile) compliance flag so that inbound validation disabled WSS4J BSP enforcement on RequestData. Services that validate WS-Security on the network could therefore accept messages that violate BSP rules, weakening protocol-level checks.
Affected versions:
Spring Web Services 5.0.0 through 5.0.1; 4.1.0 through 4.1.3; 4.0.0 through 4.0.18; 3.1.0 through 3.1.8.
Vulnerability Analysis
CVE-2026-40994 is exploitable with network access, and does not require authorization privileges or user interaction. This vulnerability is considered to have a low attack complexity. The potential impact of an exploit of this vulnerability is considered to have a small impact on confidentiality, a high impact on integrity, and no impact on availability.
Weakness Type
Insecure Default Initialization of Resource
The software initializes or sets a resource with a default that is intended to be changed by the administrator, but the default is not secure.
Products Associated with CVE-2026-40994
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Affected Versions
Spring Web Services:- Version 5.0.0 and below 5.0.2 is affected.
- Version 4.1.0 and below 4.1.4 is affected.
- Version 4.0.0 and below 4.0.19 is affected.
- Version 3.1.0 and below 3.1.9 is affected.
Exploit Probability
EPSS (Exploit Prediction Scoring System) scores estimate the probability that a vulnerability will be exploited in the wild within the next 30 days. The percentile shows you how this score compares to all other vulnerabilities.